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        <h2 id="微信公众号项目前端血泪史"><a href="#微信公众号项目前端血泪史" class="headerlink" title="微信公众号项目前端血泪史"></a>微信公众号项目前端血泪史</h2><ol>
<li><p>修改数组数据视图不更新</p>
<p>数组中的数据如果是对象，修改他的属性是无效的，数组的更新是基于其元素的添加删除修改的，所以需要使用splice函数来修改</p>
<figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">// 先修改用户信息</span></span><br><span class="line"><span class="keyword">let</span> user = <span class="built_in">this</span>.userData.users[index]</span><br><span class="line">   user.selected = !row.selected</span><br><span class="line">   <span class="comment">// 将此用户从列表删除后再插入到原位置    </span></span><br><span class="line">   <span class="built_in">this</span>.userData.users.splice(index, <span class="number">1</span>, user)</span><br></pre></td></tr></table></figure>



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<ol start="2">
<li><p>计算属性值更新了el-table的视图也不更新</p>
<p>使用自定义slot时没有指定slot-scope属性，所以视图不更新</p>
</li>
<li><p>在namespaced模式下无法获取到vuex的getters</p>
<p>尝试使用类似于state的引用方式this.$store.getters.模块.属性</p>
<p>无法获取，undefined甚至报错</p>
</li>
<li><p>vuex中的对象的属性改变并不会让computed属性修改从而的导致视图更新</p>
<p>方法一(傻逼方法)，用一个数字属性，每次修改对象时同时++然后在页面监听数字属性的变化就可以了</p>
<p>方法二:</p>
<figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">// 如果要添加新属性则放在newObj中，如果要删除属性，先删除obj的属性，然后assign即可，无需newObj </span></span><br><span class="line">obj = <span class="built_in">Object</span>.assign(&#123;&#125;,obj, newObj)</span><br></pre></td></tr></table></figure>


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